rewriting would probably be the biggest mistake you could make. you need to refactor things little by little, and avoid making changes that would be made redundant later by changes that happen later on.
figure out what you want to fix first, and then fix that. then go to the next thing. but keep in mind - "management and HQ has no real understanding", and as far as they are concerned, what they have works.
if this doesn't sound like something you want to do, then find a new job. you are effectively the property manager for a run-down rental property. you aren't going to convince the owners to tear it down and build a new set of condos.
figure out what you want to fix first, and then fix that. then go to the next thing. but keep in mind - "management and HQ has no real understanding", and as far as they are concerned, what they have works.
if this doesn't sound like something you want to do, then find a new job. you are effectively the property manager for a run-down rental property. you aren't going to convince the owners to tear it down and build a new set of condos.